There was a news story about a man from my own country (deep Serbian province, some godforsaken village no one's ever heard of) who chopped his penis off with an axe, on the log used for chopping wood, after failing to perform in bed. The wife heard him scream and called the police (apparently she had thought he was being attacked by wolves). His member was later sewn back on and the man stated that he would not be tempted to do the same again.